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/*
* GodoOS - A lightweight cloud desktop
* Copyright (C) 2024 https://godoos.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package localchat
import (
"encoding/json"
"fmt"
"godo/libs"
"io"
"log"
"net/http"
"net/url"
"os"
"path/filepath"
"strconv"
"strings"
"time"
)
func HandlerSendImg(w http.ResponseWriter, r *http.Request) {
var msg UdpMessage
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&msg); err != nil {
http.Error(w, "Invalid request body", http.StatusBadRequest)
return
}
defer r.Body.Close()
hostname, err := os.Hostname()
if err != nil {
libs.ErrorMsg(w, "HandleMessage error")
return
}
msg.Hostname = hostname
msg.Time = time.Now()
msg.Type = "image"
basePath, err := libs.GetOsDir()
if err != nil {
log.Printf("GetOsDir error: %v", err)
return
}
// log.Printf("send image to %v", msg.Message)
// log.Printf("Type of msg.Message: %T", msg.Message)
paths, ok := msg.Message.([]interface{})
//log.Printf("paths: %v", paths)
if !ok {
libs.ErrorMsg(w, "HandleMessage message error")
return
}
sendPath := []string{}
for _, v := range paths {
p, ok := v.(string)
if !ok {
continue
}
filePath := filepath.Join(basePath, p)
// 处理多张图片
if fileInfo, err := os.Stat(filePath); err == nil {
if !fileInfo.IsDir() {
//handleFile(filePath, toIp, msg)
sendPath = append(sendPath, p)
}
} else {
continue
}
}
msg.Message = sendPath
SendToIP(msg)
libs.SuccessMsg(w, nil, "图片发送成功")
}
func ReceiveImg(msg UdpMessage) ([]string, error) {
res := []string{}
baseDir, err := libs.GetOsDir()
if err != nil {
log.Printf("Failed to get OS directory: %v", err)
return res, err
}
// 创建接收文件的目录
resPath := filepath.Join("C", "Users", "Reciv", time.Now().Format("2006-01-02"))
receiveDir := filepath.Join(baseDir, resPath)
if !libs.PathExists(receiveDir) {
err := os.MkdirAll(receiveDir, 0755)
if err != nil {
log.Printf("Failed to create receive directory: %v", err)
return res, err
}
}
paths, ok := msg.Message.([]interface{})
//log.Printf("paths: %v", paths)
if !ok {
return res, fmt.Errorf("HandleMessage message error")
}
var savedPaths []string
for _, v := range paths {
p, ok := v.(string)
if !ok {
continue
}
imgUrl := fmt.Sprintf("http://%s:56780/localchat/viewimage?img=%s", msg.IP, url.QueryEscape(p))
resp, err := http.Get(imgUrl)
if err != nil {
log.Printf("Failed to download image from URL %s: %v", imgUrl, err)
continue
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
log.Printf("Failed to download image from URL %s: %v", imgUrl, resp.Status)
continue
}
// 生成随机文件名
// 生成随机文件名并保留扩展名
fileName, err := generateRandomFileNameWithExtension(p)
if err != nil {
log.Printf("Failed to generate random file name: %v", err)
continue
}
filePath := filepath.Join(receiveDir, fileName)
// 保存图片
err = saveImage(resp.Body, filePath)
if err != nil {
log.Printf("Failed to save image to %s: %v", filePath, err)
continue
}
receviePath := filepath.Join(resPath, fileName)
savedPaths = append(savedPaths, receviePath)
}
if len(savedPaths) > 0 {
return savedPaths, nil
}
return res, fmt.Errorf("no images were saved")
}
// 生成随机文件名并保留扩展名
func generateRandomFileNameWithExtension(originalFileName string) (string, error) {
_, fileExt := filepath.Split(originalFileName)
fileExt = strings.TrimPrefix(fileExt, ".")
if fileExt == "" {
fileExt = "png"
}
randomFileName := fmt.Sprintf("%s.%s", strconv.FormatInt(time.Now().UnixNano(), 10), fileExt)
return randomFileName, nil
}
// 保存图片到本地文件
func saveImage(reader io.Reader, filePath string) error {
file, err := os.Create(filePath)
if err != nil {
return fmt.Errorf("failed to create file: %v", err)
}
defer file.Close()
_, err = io.Copy(file, reader)
if err != nil {
return fmt.Errorf("failed to write image data to file: %v", err)
}
return nil
}
func HandleViewImg(w http.ResponseWriter, r *http.Request) {
img := r.URL.Query().Get("img")
if img == "" {
libs.ErrorMsg(w, "img is empty")
return
}
decodedImgParam, err := url.QueryUnescape(img)
if err != nil {
log.Fatalf("Error unescaping image parameter: %v", err)
}
basePath, err := libs.GetOsDir()
if err != nil {
log.Printf("GetOsDir error: %v", err)
return
}
filePath := filepath.Join(basePath, decodedImgParam)
log.Printf("filePath: %s", filePath)
// 检查文件是否存在
if _, err := os.Stat(filePath); os.IsNotExist(err) {
libs.ErrorMsg(w, "file not found")
return
}
// 设置正确的 MIME 类型
mimeType, err := GetMimeType(filePath)
if err != nil {
http.Error(w, "Failed to determine MIME type", http.StatusInternalServerError)
return
}
// 设置响应头
w.Header().Set("Content-Type", mimeType)
// 读取文件并写入响应体
file, err := os.Open(filePath)
if err != nil {
http.Error(w, "Failed to open file", http.StatusInternalServerError)
return
}
defer file.Close()
_, err = io.Copy(w, file)
if err != nil {
http.Error(w, "Failed to write file content", http.StatusInternalServerError)
return
}
}
func GetMimeType(filePath string) (string, error) {
f, err := os.Open(filePath)
if err != nil {
return "", err
}
defer f.Close()
// 读取前 512 字节以确定 MIME 类型
buffer := make([]byte, 512)
_, err = f.Read(buffer)
if err != nil {
return "", err
}
mimeType := http.DetectContentType(buffer)
return mimeType, nil
}